mesh correct and textures too

src/image.rs

@@ -29,6 +29,10 @@ pub unsafe fn create_texture_image(
     let size = reader.info().raw_bytes() as u64;
     let (width, height) = reader.info().size();
 
+    if width != 1024 || height != 1024 || reader.info().color_type != png::ColorType::Rgba {
+        panic!("Invalid texture image (use https://kylemayes.github.io/vulkanalia/images/viking_room.png).");
+    }
+
     let (staging_buffer, staging_buffer_memory) = buffer::create_buffer(
         instance,
         device,